Noiseless typewriter



y 3 J. A. RUFFIN 'NOISELESS TYPEWRITER Filed'April 11, 1923 In aerator.-QZjln A.Rzgfi n, m 7%? Patented Ma 31, 1927.

JOHN

ALLAN F. RUFFIN EXECUTORS OF SAID JOHN A. RUFFI'N, DECEASED.

NOISELESS TYPEWRITER.

Application filed April 11, 1923. Serial 1%. 631,414.

can be-used. Another object is toprovide such an organization as will beapplicable to typewriters of well known makes, such as the Underwood,Remington, and others, without changing the fundamental plan ofsuch-machines or the general plan of their type bar. baskets, it beingnecessary only.

to substitute my improvement for the type bars in said machines.

Other objects will appear from the following description and thefeatures of novelty will be pointed out in. the appended claims.

In the accompanying draw1ngs:-

Fig. 1 is a side view of a key lever organization like that of theUnderwood machine,

with my improvement incorporated therein.

Fig. 2 is a view of the main type bar.

Fig. 3 is a'view of the supplemental lever or resser attachment.

' ig. 4-is an edge view Figs. 5, 6 and 7 are views of the type.

Fig. 8 is a sectional view through the type and the main andsupplementaltype bars on the line 8--8 of Fig. 1.

of Fig. 3.

Fig. 9'is a sectional view on line 9-9 of Fig. 1. Y

Figs. 10 and 11 are detalls, the latter figure showing one of the bentkey levers 011 to the side of the keyboard. a

In these drawings the finger key lever 1 is of ordinary construction, asis also the associated'parts which are connected with the main typecarrying member or bar 2. Instead of this bar carrying fixed thereto, asin standard machines like the Underwood, etc., I mount the type slidabluponthe upper end of this bar or lever,

whlch, for this purpose, is provided with an v which is slidably mounteda.

opening 3 in block 4. The on this rivets, as shown. I I p This block 4's made about one-thousandth of an inch'thicker than the type bar sothat the type may slide freely in relation to the head of the lever ortype bar 2, that type 5 is immediately mounted is, without frictionagainst the sides of the the type rigidly. '19, for the same reason,betweenwall of the opening 3 and the rear faceof block, being connectedthereto by I v mental presser lever 9 will strike against the said bar.There, is a light spring posed between the type and the bar 2,this

springbeing shown at 7. Its function is A. nurrmpormnnnnrown,CONNECTICUT; HORACE Enwnnn nurrm AND tov holdthe type in normal positionin re-' lation to the type bar 2. lVhile I have shown one form ofspring, it is obvious that this may be. changed to other forms. A light.spring may be used here, ofierin little resistance tothe forwardmovement 0 the type, in relation to the bar.

To the main type bar 2 there is pivoted at 8 .a supplemental lever 9.Thissupplemental lever is of flat metal having an ofi set head portion'10 with a laterally extendmg flange 11 along its front edge whichextends across in-rear of the head or upperportion of the main'lever or,bar 2, so as to press, when operated upon the rear end of the type formaking the printing impression. This supplemental lever is piv otedclose to the head orfree end otth'e bar or lever 2, making a. shortlever armhere, and its long arm 9 extendsalo'ngthe bar 2 towards thepivot of the latter. It

-is provided at its end with an car 12 extending across'the edge of thebar 2, and having riveted thereto a pin which at its other end extendsthrough an ear 13 formed on the rear. edge of the bar 2 andextendinglaterally in respect thereto.

A spring 14 encircles'the pin and bears at its ends against the ears 12and 13.

f There is a space at 18 between the front edgexof the head of the bar 2and the rear face of the type, allowing pla .atthis point so that thebar 2 at its upper ont'edge will not strike the type and lmpinge' itupon the platen with a blow, and there is also 1play at t e rear theblock 4. 4

.When the key is de bar 2 is swung up rom its substantially horizontalposition towards the; platen and when it reaches the position shown indotted lines in Fig. 1 the ear 12 of the supple-' bar will continue itsforward 1z1novement slightly. but, owing to the play between the ressed,the main type, I

slidable type: and said lever 2, the type will not be thrown forciblyagainst the platen thereby, but there will occur a relative movementbetween the main' and supplemental levers, resulting in a pressingaction of the type against-the platen instead of a blow.

In other words, the forward movement of" .the bar 2 will be partlychecked when the supplemental type bar 9 strikes the noiseless.

stop, and it will have some further though retarded movement against theyielding resis'tance of the spring cushion 14 suflicient noise whichresults rendered sufiic'ient for maximum manifoldmg. The stop as "thecompositetype bar is operated forward. This stop being of rubber orother. non-sounding material, it is obvious that there is no noise intaking the blo w of the composite type bar. The forward printing "actionof the type is accomplished by the 3 --supplemental or presser lever 9swinging around its pivot, pressing the type in a horizontal line to.the printing point.

' A stop'pin' 16 on the lever 2 enters a slot 17 in the supplementallever 9 and limits the separating movement of these levers relativedeparting from .the underlying to each other. a

The stop 15 may be either of rubber or of other noiseless material, suchas leather.

' I do not limit-myself to the mechanism described, as this may bechanged without principles of.

the-invention. The drawings and specification are presented asillustrative of oneform in which the invention may be embodied, and-not' as being' restrictive upon the scope of the invention, which isdefined by the apdo notlimit myself as the type may be otherwise relatedto the supplemental lever 9 vto be pressed thereby against the platen.

It will be observed that standard makes of typewriting. machines 'nowbeing made can be rendered. noiseless by using my improved type bar, andstandard machinescan be converted into noiseless ones by taking outt-hestandard bars and substituting therefor the composite type barsdescribedabove.

A metal surface platen can be used with my invention. therebyproducingclearer cut manifold copies than ones made'on rubber covered platens.

15 receives the shock of'the blow,

, operatin p and operated towards composite type bar instead of theordinary l by to check the rezone;

l. A composite swinging type bar fon I bar pivotally mounted andoperated bya keyleVer, a supplemental bar pivoted to the main bar, andhaving movement relative I. thereto, a type member slidable on the mainbar and pressed against the platen by the typewriting machinescomprising a main supplemental bar, and a noiseless stop 7 against whichthe supplemental lever strikes on the forward movement of the type bar,

substantially asdescribed.

2. In combination a swinging type bar fortypewriting machines, a typemember carried by said bar andmovable relative thereto, means forretarding the movement of the type member towards the platen, meanscarried'by the swinging type bar independently of said type-member formoving the type member in relation to the. swingmg type bar and pressingit against the 1 platen and stop means for arresting the movement of theswinging type bar and for operating the said means to perform itspressing action on. the type member,substantially as described. l 3. Incombination in type bar actions for typewriting machines, a swingingbar, a key lever for swinging said bar towards the platen, asupplemental bar or lever pivoted with, a noiseless stop fixed totheframe. of the machine and against which the supplemental lever strikes,type pressed by the supplemental. bar upon the platen, and a springbetween the main and supplemental bars which yields in checking theforward movement of the swinging bar and allows the supplemental bar tomove in relation to the main bar to press the type upon the platen,substantially as described.

, In a typewritm machine, a type bar, a platen a type slida le on thetype bar for printing by pressure in combination with means mounted onthe type bar for exerting said pressure, and a stop on the frame for bmoved to a position adjacent the platen.

'5. In-combi'nation, chine, a key lever, a bar pivotally mounted theplaten by said key a lever ivoted to .the bar near the free end thereoand having its longer arm between said pivotand the pivot'of the bar,'astop on the frame against which salddonger arm impinges, a springbetween the bar and the lever carried thereforward. movement of the bar,butto allowsaid barto have, further movement'after being checked tothereby ever, a type member,

in a typewriting ma- 10b to the bar first mentioned and movable theresaid means when the type bar is 20 type member upon the platen, and aspring pmges,

secure a relative movement of the lever about its pivot on the bar, saidlever in said relative movement pressing the type member upon theplaten, substantially as described. 6. In combination, in a typewritingmachine, a key lever, a bar pivotally mounted and operated towards theplaten by said key lever, a type member, a lever pivoted to the bar nearthe free end thereof, and having its longer arm between said pivot andthe pivot of the bar, a stop on the frame against which said longer armima spring between thebar and the lever carried-thereby to check theforward movement of the bar, but to allow said bar to have furthermovement after being checked to thereby secure a relative movement ofthe lever about its pivot on the bar, said lever in said relativemovement pressing the therewith, a yielding noiseless stop against whichthe supplemental lever strikes for swinging the supplemental bar orlever in nelation to the main bar, type movably, mounted in the type barindependently 01 said supplemental bar to be pressed by the supplementalbar upon the platen, and means for restraining the free movement of thesupplemental bar, substantially as described.

In testimony whereof, I afiizi my signature.

JOHN A. RUFFIN.

the platen, a supplemental bar orlever pivoted to the bar firstmentioned and movable

